PEMBUATAN SISTEM PENYAMPAIAN INFORMASI SUARA (AUDIO) KE BERBAGAI TEMPAT/RUANGAN MENGGUNAKAN MIKROKONTROLER AT89S51

Abstract

Have been done a system making of voice information (audio) to various place / column use microcontroller AT89S51. System can be used in so many area like officeblock, hospital, schoolhouse and dissimiliar building andowning a lot of column. The system basically work to control relay in slave system, every slave system have an own data address, the data address accessed by through emphasis keypad, data from keypad processed by an especial master presented to LCD and delivered serially to slave system, if data address who sent is equal at one of slave, it will be make the active speaker of slave system turn on. This system have been done and can be present answer from slave system at LCD which be at master control. This system can interface to 31 slave system at one blow and can be conducted at maximal distance 1,2 Km.